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Responsively is a free and open source developer tool for responsive web development. It shows all devices side by side, replicates clicks, scrolls, and navigation across devices in real time, supports saving device combinations as Preview Suits, and includes a unified inspector and one-click screenshots.
Semantic UI is a development framework for creating responsive layouts using human-friendly HTML. It treats words and classes as exchangeable concepts, using syntax from natural languages. It uses simple phrases called behaviors to trigger component functionality, and includes an intuitive inheritance system with high level theming variables. The project is described as free and open source.
Sprite Fusion is an independent software company making tools for game development. Its tilemap editor is a free, web-based level design tool for crafting 2D tilemaps in the browser using any tileset, with auto-tiling, collisions and one-click exports to game engines. The company also offers a pixel art generator, a Pixel Snapper tool and an API.
StackBlitz is a collaborative browser-based IDE for web developers that runs development environments inside the browser through WebContainers, avoiding time-consuming local configuration. It also offers Bolt, which turns text into working web apps in the browser. The free Personal plan includes unlimited public projects and GitHub repositories.
The stacking workflow describes stacked pull requests, stacked diffs and stacked changes as an alternative workflow for managing pull requests. The site argues that code review takes a long time and slows developers down, and that stacking parallelizes development and code review so work can build on changes not yet merged. It notes that stacking manually is hard.
Storybook is a frontend workshop for building UI components and pages in isolation. It helps developers develop and share hard-to-reach states and edge cases without running the whole app, and supports UI development, testing and documentation. It is open source and free.
An index of independent tech blogs covering JavaScript, CSS, DevOps, Python and related topics, written by people who build things. The page also lists free developer tools and reading maintained by Marko Denic, including web development resources, an article banner tool, a snippet editor, code tools and a JavaScript quiz.
A collection of useful online web development tools, published at tiny-helpers.dev. Contributions are closed and pull requests are disabled, after the project was flooded with low-effort, AI-generated submissions. The project is licensed under MIT and uses Vercel's routing configuration.
A curated list of tools and programs for developers, devops, admins, and others, organized into categories such as architecture and diagrams, API development, and backup and archiving. Most listed items are open source, though not all, and the page advises checking applicable licences. The project is hosted on GitHub.
XAMPP is a free, open source Apache distribution that bundles MariaDB, PHP, and Perl. It is presented as an easy-to-install PHP development environment, with installers available for Windows, Linux, and OS X.
